Pressure-regulator



(No Model.)

J. DE G. RRASSINGTON.

, PRESSURE REGULATOR.

Patented Feb. 12, 1895.

' INVENT. @I6/@ml WITNESSES :Y

' UNITED STATES PATENT OFFICE.

JOHN DE GROAT BRASSINGTON, OF PORT RICHMOND, NEW YORK.

4PREssuRIE-RecoLAT-0R,

sPEcIFIcATIoN forming perfor Leners Patent No. 533,864, rated February12, 1895.

Application filled March 25, 1 892. Serial No. 426,334. (No model.) I

To allwhom it may concern: t

' Be it known that I, JOHN DE GEOAT BRAss- INGTON, a citizen of theUnited States, residing in Port Richmond, yin the county of Richmond andStatefof New York, have invented certain new and useful Improvements inPressure-Regulators, of whichthe following is aspecitication.

`This invention relates to `pressure regulators of,the class havingingress and egress passages v and a valve automatically controllingcommunication, between said passages actuated automatically by thepressure at the egress side of the regulator.

My invention aims to provide an improved regulator acting on thisprinciple which will be simple of construction, which will operateVfreely-and with the minimum of friction'al retardatiomand which can beadjusted to remain entirely open until 'amaximum egress pressure isreached, and which will not chatter. in use. f t

To this end in carrying out my invention I provide certain improvementsin the construction andarrangement of such regulators wh ich will behereinafter fully set forth.

In the accompanying drawings, Figure lis an axial section of a pressureregulator con-x structed according to the preferred form of myinvention. Fig. 2 is a separate plan view of the compression spring, andFig. 3 isa plan View of the spring used for opening the valve in thisinstance.

Referring to the drawings let A indicate the valve shell; B, the ingresspassage thereof; C, the egress passage; D, the valve as a whole; E, thepiston; F, the cylinder therefor; I, the conduit between the egresspassage and cylinder; J, the auxiliary Valve chamber; K, the auxiliaryvalve therein; L, the stem of the latter; M, its spring; N, itsadjusting handle, and O the cap closing the top of chamber J Aandthrough which the stem w operates.

The shell Amay be of any suitable or convenient construction, but Iprefer to construct it as shown as a single integral casting. Preferablyitis constructed with a projecting valve 1 seat a, betweentheingressand'egress passages., thisaseatibeing here. shown as tapered, andaxially above said seat with a cylindrical guiding chamber bandthereabove with an enlarged cylinder F'into which said chamber b opens,a shoulder c intervening between the cylinder and chamber. The duct I,preferably consists of a vertical conduit d rising from thepassage C tothe auxiliary chamber J, and a horizontal passage e communicatingbetween the latter and the cylinder F. The

The sh'ell A is cast in one integral piece by 65 providing a core.corresponding to the interiors of the passages B and C, guiding chamberb, cylinder F, ducts e and d, and valve chamber J. This Icore can beconveniently formed in one piece, and its ends can projectfor support inthe' mold beyond the end of the valve chamber J, cylinder F and passagesB and C. By disposing the duct d and valve chamber J in .the same axialplane, on substantially the same axis, and the cylinder F andiguidingchamber b on the same axis and parallel with that of the duct and valvecharnber, vthis coring `is rendered simple and convenientJ The valve Dand the piston E may each be of any desired construction and may beconnected together in such manner as conven- Preferably the valve issub- Y ience dictates. stantially balanced, and is constructed with ahead f having a tapered seating end g, fitting the'seat-ct, a reducedmiddle portion withinthe passage B, and a cylindrical packed portion h,fitted to slide in and be guided by the guiding chamber b. Preferablythe vvalve is constructed to seat im passably against the seat d and tomove axially away therefrom in opening. It is packed at its upper end,preferably by a packing ring z', with suflicient tightness to preventleaking at this end, but in such manner as to reduce to the minimumfrictional retardation of its movement in the chamber b.

The piston E is preferably constructed with IOC) joint. Preferably thepiston and valve are connected together by a stem Q shown as formedintegrally with the disk 7o, depending therefrom into the chamber b andhaving a head n, clamped to the valve head f byabolt p in such manner astoA secure the packing ring t' between the portion 7L of the valve headand the head n.

Any suitable or convenient means may be provided for giving the valve anormal tendency to open. I prefer to employ the leaf spring R, which inthe construction shown is a four armed spring, having a central apertureq, embracing the stem Q, and bearing at its center against the disk 7a,and at its extremities against the shoulder c, the spring acting whenexpanded to ,force the piston and valve away from the valve seat.

Preferably an orifice S through the shell A affords communicationbetween the exterior and the interior of the cylinder F below the pistonE. This orifice constitutes a duct whereby atmospheric communication isafforded to prevent abnormal pressure beneath the piston as it descends,or vacuum as it rises.

According to the construction described the valve D will normally standopen, permitting iiow through ingress passage B to egress passage C, andthe pressure in the latter will rise through duct I, and act incylinderF against piston E, tending to close the valve against thespring R. As the egress pressure increases the valve will be forcedtoward its seat and at the predetermined limitof egress pressure thevalve will be tightly seated against this seat by reason of the pressureagainst the piston E overcoming the resistance of the spring R. As thepressure falls at the egress side the spring will again open the valve.

I will now describe my improved auxiliary valve. The function of this isto control the operation of the main valve B, to maintain it completelyopen until the egress pressure ar rives at a predetermined limit, andalso where the regulator is to be thrown `out of operation as such, tocut olic communication between the egress passage and the piston,whereupon the valve will be balanced and maintained open by theprovision tending normally to open it.

Preferably the auxiliary valve in action operates automatically asheretofore to close communication between the egress passage and thepiston until a certain limit of egress pressure is reached, whereupon itautomatically opens, andthe pressure rushing into the cylinder F actsagainst the piston E and closes the valve D quickly.

In the'construction shown, the auxiliary valve K is a piston valveconstructed with a head r, surrounded by a packing ring s and workingvertically in the auxiliary valve chamber J, operating as it passes theduct e to close the latter and thereby interrupt communication throughthe conduit I. Preferably the valve K is constructed with a disk tclamped against the head o by a bolt u, and serving to secure thepacking ring s in place. Preferably the valve K has a stem L for guidingit, that shown being a cylindrical stem entering a recess T in thehandle N, guided thereby,andilimited in its outward movement by abuttingagainst the end u of such recess, which thereby serves as a stop.

vPreferably the valve K isa spring actuated valve. In the constructionshown a spring M mounted above the valve within the chamber J tends toforce the valve downward against the egress pressure and thereby to seatit. The construction of spring shown is that I prefer to use. Itpreferably consists of separate elastic leaf like pieces U U, andinterposed inelastic disks V V. AThe piecesU are shown asmm constructedwith four arms, and these pieces and the pieces V are each provided Withcentral perforations fu. All the pieces of the spring are separate andindependent, whereby it can readily be repaired by substituting aperfect for an imperfect piece and its length can be altered by addingto or removing the requisite number of pieces.

In the construction shown the pieces of the spring M are passed over thestem L of the valve with their central perforations v embracing thelatter.

The regulating handle N is constructed to be adjustable toward and fromthe valve to adjust the position of the latter and to control itsoperating tension. Preferably the stem w of the handle is screwthreaded, passing through a screw threaded aperture in the cap O and itsend a: bears against the spring M whereby as the handle is adjusted, itcompresses or expands the spring to increase or diminish its tension onthe valve. When the handle is screwed inwardly its stop u by abuttingagainst the stem L forces the valve closed and prevents its openinguntil readjusted, thereby entirely disconnecting the cylinder F andpiston E from the egress passage, whereupon the regulator ceases to actas such, and even pressure exists in both passages, the valve Dremaining open under tension of its spring R.

In operation the handle of the auxiliary valve will be adjusted so thatthe latter will remain closed until a predetermined limit of egresspressure is reached. Until this time the piston E and Valve D will beopen and removed from the action of the egress pressure. As soon as theauxiliary valve opens the egress pressure will act against the piston E,to con trol the valve D, and if stronger thanthe tension of the springRwill quickly close the latter without intermediate oscillation thereof.

It will be seen that my invention provides an improved pressureregulator which can be readily thrown into or out of action andconveniently controlled, which is simple in construction, and in whichthere is but two packed surfaces affording frictional retardation to theoperation of the valve, and which will not chatter.

IOO

IIO

It will be understood that my invention is not limited to the eXactadaptation or construction described and shown, and that it may bevariously applied and moditied'as cirl egress passage C and the outerend of'said cylinder, in combination with valve D fitting saidcylindrical guiding chamber, constructed with seating end g for engagingsaid seat, a reduced niddle portion above said end and opposite theingress passage, cylindrical porl tion h above said passage, and thepiston E in said cylinder. constructed with depending stem Q enteringsaid guiding chamber and carrying at its lower end head nclamped to saidvalve by screwvp, all substantially'as and for the purpose set forth. p

2. VIn a pressure regulator, the combination with the integral shell Ahaving ingress passage B, egress passage C, valve seat a, cylin- Vcap'O, and acting against said spring to control its tension, and havingrecess T in its der F, duct d communicating with said egress passage,valve chamber J at top of said duct, duct e between said valve chamberand said cylinder, and guiding chamber b beneath said cylinder, valve Din said guiding chamber for controlling communication through theregulator, piston E in said cylinder for controlling said valve underthe egress pressure, valve K in said valve chamber for controllingcommunication through said ducts to said cylinder, upwardly extendingstem L for said valve K, a spring, as M, surrounding said stem, inclosedin said valve chamber and acting. tomove said valve against the egresspressure, cap O, closing the top of said valve chamber, and `handle Nfor controlling said valve K, constructed with exteriorly screwthreadedstem'wadjustably traversing said end engaging the end of said valve stemL, all constructed substantially as and for the 'purpose setY forth.

JOHN DE GROAI BRASSINGTON,

Witnesses:

GEORGE H. FRAsER, CHARLES K. FRASER.

